Radioactive Decay Flashcards
1
Q
What is radioactive decay?
A
when an unstable nucleus breaks down and emits one or more of 3 types of ionising radiation
2
Q
What does half life mean?
A
the time taken to reduce activity by half by a radioactive element
3
Q
Where does radiation come from?
A
50% radon gas (rocks) ground and buildings medical uses food and drink cosmic rays other and nuclear
